Tired of those machines - generated sudoku puzzles you get in the daily newspaper? Want to take it to the next level?
This collection is not for the faint of heart, Conceived by Master Puzzle Craftsman Tetsuya Nishio, these puzzles are designed to provoke and stimulate even the most storied sudoku veteran.
So...think you're ready for it?
About the Author
Tetsuya Nishio, world champion of number-logic puzzles, reigns as the single most important figure in Sudoku in Japan. Nishio is also the inventor of O'Ekaki, or "Paint by Numbers" puzzles.